Micrometer-calipers.



BEST AVAILABLE COPY M. KUNIK. MICROMETER CALIPERS.

APPLICATION FILED MAR. 4, 1912.

Patented Aug. 19, 1913.

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l reference to tion by eft'ented ling. i9, 19153,

applicationle Mariela l., E912. Serial No. Sb.

To Q53 whom may condena:

Be it known that, MICHAEL BLUME, a eitizenof the United States, and aresident of the city or" Caio-ago, county of Cook, and State oiillinois, invented cert-ain new and useful improvements in MicrometenApers, of which the following is a 'specilviy inventionlrelates 'toimprovements in calipers and more speciically tothat class thereofeliaracterized because of the adaptability thereof for mieroinetrioadjustment.

'ihe object of iny invention is the production of a caliper of thechar-acte;` inentioned which he readily and quickly 1' ftd to `nearlythe proper dimensions ad tien as easilyr and expeditiously' adjusts-dtothe exaot measurement.

r further object is the production of a Caliper as mentioned which willhe of dura hle and economical construction and eiiicient in i 1 @ti eroojeets will a pear hereinafter.

The invention consists in the combina.- tions and arrange ents of partehereinafter described claimed.

My invent-ion Wili ne heetunderstood by the accompanying dranf'ingforming-a part of this specification, and in which is side elevation ofa micrometex caliper embodying my invention7 Fir? 2 is a verticalcentral longitudinal section thereof, portions however being sho 7n inelevation, Fig. 3 is a slightly enlarged detail section tellen on line3--3 of Fig. l, and i is a sectional detail of the outer'end portion 0:5the caliper steelt.

The "peoried forni of iny construct-ion as ilhistrated in the dra-Wingcomprises a tubular stock #eonsisting of the tubular portiene i and f2,the adjacent ends of the memb rs l and 2I being telesco' ed andpreferably secured rigidly together y shrinking. Secured rigidly uponone end of the stock or upon the outer endof the member l is the fixedjaw E which is of ordinary design. Surrounding the outer end portion ofthe member 2 is a sleeve Li' which is tightly fitted thereon, the sainebeing held in posi friction. Provided upon one side of the outer suaceof the sleeve et is a c ries'oi gadnations 5, divided according to anystandard desired, es inches, the numbered gradnations being tenths ofinches vneetion 11i and the and the smal-ler divisions fort-ieths.Provided at one end of the sleeve i is a porteration 6 which aords meansfor engagement by a circular wrench for effecting rotary adjustment ofsaid sleeve in order to properly position the longitudinal graduationwith respect to graduations on the barrel as will be presentlydescribed. The barrel just referred to is shown at Y, the saine beingslidahly and rotatably mounted upon the sleeve d. @ne end ot said barrelis cireunferentially graduated, the graduations 8 being arranged forcooperation with the lonzitudinai graduation upon said sleeve 4, theadjacent terminal edge of said barrel tions 5 .in the manner Well known.The oir`- onniferenee of barrel 7 may oedivided into any number ofsections, that is the graduations 8 he any desired distance apart, saidcircui'nierenee being however divided preferably into twenty-livenotions in order that measurements in thefthonsandths or an inch may bemade as set forth hereinafter. The opposite end of the barrel 7 is'preferably knurled shown in onder to 'aciiitate rotation thereof oy thefingers. Said end oi said barrel is provided internally with a taperingseat 9 for the reception of the oor.-

respondingly formed end l@ o1" a screw ll arranged eo-axial with saidharel. The screw il engages the adjacent end portion of the stock member2 which is internally screw threaded to receive the same, the outer endoit' 'said screw being provided with a cylindrical extension l2l'which'slidably cn-' gages the opening through the members l Q .in orderto maintain said screw in proper axial position in the stock. E heinternally threaded end of the member 2 is also split longitudinally andthe outer sur-, face. thereof is ta Jering in forni and screw' threaded.Threaded upon said tapered poi"- tion is a collar 13 through the mediumof Whieh said end o said block member 2 .may be Contracted in order to.take up Wear lupon the internal thread of said block member or upon thethreads of the screw 11. Said screw il is securely locked to the barrel't' through the medium ofthe threaded con.` cap l5 so thatrotation ofsaid barrel will ei'i'eot corresponding movement of said screw and hontelongitudinal feeding of Said barrel, By reason of the peealiarconoeation letween *the cooperating with the transverse' graduaf,

,El I

@Swed ahh? moan m :y hour" Outs fue @med

venas foi? recesses'i-n its mounting mei'nber -adaptedfto';l

receivefsai'd' inner as described.V

jaws adapted snugly, substantially l 2,' 11i-. Quipergfthe 'combinaties'fof! twov to measure inside Aand outside i-dmensions; a screw'arrangedta feedsaid jtowardand away from eachv other, one

l, of said jawsbeingadjustably mounted-with ?res'pect 'to said screw; Al0 uring the feed. of said Jaws andlfaplurality.

{of sets of means forf'accurately positioning aduationsfor 'meassaidadjustable jaws'iun two dierent p dsiti ns with respect tosaid screw,.whereby i vsaidgraduation's will read for both inside and outside'dimension-scf 'said jaws, substantially as described.

jaws adaptedvto measure inside and outside 20l' j'aws toward and away frOIh "each Other,

dimensions; a 'screw arranged to feed said neof said jaws'beingadjustably mounted with respect tosaid screw.; :graduations formeasuring tlie feed of` saidj'aws; aplur'ality of sets o ,25

inneren'dand'fa plurality off pairsbfre# receive said 'as described.

l means vvfor accurately 1ipositioning; said adjustable jaws'i'n two dierent Aposi. tions with respect lto said. screW, whereby said'graduations will read for both` inside A and outside dimensions ofsaic' l javvs,LA said means comprising a set screw carried by saidadjustable jaw and plovidedjw'ith a' conical casses in -its mountinmember adapted to" 4.1111 'a caliper, the combination oflatubular-stock; a fixed jaw carriedby' one .withan 'internal screw'thread ai circumfer-A itatably-mounted upon'v said stock;a1screw Lsaidbarrel-and I connected for n iovement 'with f helatter; a barA fixed itone eindvto said fixed jaw'and having its re'efend telescoping saidtube; a Tj aw mounted for slidy screw, said recesses being arrangedinppairs,

ed for engagementby said'set'screw to position said movable jawrelatively to. said' gra'duations lfor 'insidev caliperirigg,v and thebther of saidrecesses'being adapted for armovablejja'w relatively 'bysaid -graduations forl -outside .lcal'peringg substantially as fie;'SCIlbedL :of two-.subscribing Witnesses.

Witnesses- 3. l

' JQHNFLORIAN entially graduated barrel slidablyand 1' o' able Vadju'stment'non` said tube; anda.- set j screw for securingfsaid jaw in`positions-of adju'stm'ent,4 there being recesses in one side. oflsaidtube for engagement by said set' one recess o f each of said pairs-beingadaptasA l endof said stock, lsaid stock bein-g provided A.

connected with saidgbarrel and engaging said internaLscreWgthreadefsaid-stockya tube extending parallel with said stock' and MICHAEL KUNIK;

